How do you approach learning a new concept?

I think I'm more of a visual learner than the average person because I find books never provide enough pictures so I have to come up with my own mental image to represent the majority of the concepts I come across. An example is right now I'm trying to comprehend the concept of a joule second and why Plancks constant uses that unit but I don't really know what to picture for this. How else would I approach this? Mathematically?